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As Mayfair’s only resident agent, Harvey Cyzer brings an insider’s perspective to one of London’s most competitive markets. We sat down with Harvey to discuss the current landscape, how OB Private is setting a new standard, and why discretion still defines the very top of prime real estate.
How would you describe the past 12 months for OB Private?
It’s been a year of real progress. We recorded a 98% increase in turnover year-on-year and placed second in all residential transactions in Mayfair. That momentum reflects the way we approach the market with clarity, discretion, and a genuine understanding of what prime clients expect today.
What do clients expect today?
Pace, precision and genuine advice. Clients want to know you have a clear strategy from the outset, not just marketing spin. They want discretion, a sense of control, and above all, confidence that you're going to deliver what you say you will.
What sets OB Private apart?
We set out to challenge the traditional agency model. We’re not just focused on transactions. We’re building a long-term brand that integrates real estate, travel and lifestyle under one trusted platform. Clients today expect more: they want expertise, but also access, service, and genuine alignment with the way they live. That’s why our pillars – OB Property, OB Travel and OB Circle – are all connected. It gives clients a seamless experience, from acquiring a home to curating their lifestyle around it.
Are there any standout instructions you're excited about at the moment?
We’re very fortunate to be advising on some exceptional homes across Mayfair, Belgravia and St James’s. There’s a particular focus at the top end of the market. Properties with provenance, craftsmanship and discretion built in. It's a strong book at the moment, and we're seeing real appetite for the right assets.
You’ve lived in Mayfair all your life. How does that shape your approach?
It gives me a different perspective. I’m not looking at Mayfair from the outside – it’s home. You pick up on the subtleties, the changes in tone from street to street. You build long-term relationships naturally because you’re part of the community.
What does success look like to you?
It’s delivering outcomes that feel effortless to the client but are the result of hard, detailed work behind the scenes. It’s the quiet calls saying, “We’ve secured it,” without fuss. It’s clients who come back…not just for one deal, but across generations.
Where do you see the prime market heading into 2025?
The fundamentals remain strong. Prime central London is resilient because it offers something you can’t replicate elsewhere: security, culture, connectivity. Buyers are increasingly discerning, but when the right opportunity presents itself, they move quickly. Our role is to be ahead of that curve.
And outside of work, where would we find you?
Most likely having dinner at Wiltons. I keep it simple – good food, familiar faces, and a short walk home.
To view all our properties or to discuss prime opportunities in Mayfair, contact harvey@obprivate.co.uk.
Current highlights include:
Chesterfield House, W1J
Mayfair, Guide Price £3,295,000
A fully refurbished ninth-floor penthouse with panoramic skyline views, private roof terrace, lift access, 24-hour concierge, and interiors by Maurizio Pellizoni with furnishings by Minotti London
South Street, W1K
Mayfair, Guide Price £9,950,000
This beautifully presented three-bedroom apartment sits in the heart of Mayfair Village spanning the fifth and sixth floors of a period building with lift, porter and a south-facing private terrace.
Grosvenor Square, W1K
Mayfair
A once in a generation penthouse overlooking Grosvenor Square with extraordinary potential. The 947 square foot south-facing roof terrace spans 44 feet in width, a true rarity in Mayfair. Private lift access and 24-hour concierge complete this exceptional opportunity.
Explore our portfolio of prime Central London properties available to let and for sale. For access to exclusive off-market opportunities, please contact our Private Office directly.
Whether you are looking to buy, rent or discreetly let a prime property, our team offers a tailored service built on deep market knowledge, trusted relationships and a highly personal approach. Based on Bruton Street, just off Berkeley Square and Bond Street, our upper-floor Mayfair office provides a private, discreet space for client conversations.
View all Mayfair properties currently available.
